PRISM is a pilot project involves studying how parents control their emotions, behaviors, and heart rate when disciplining their preschoolers. This project is designed to test methods for the capture of biological data using wearable technology in the home and using a phone app to collect information on discipline and stress. Our interest is in understanding how parents regulate themselves while disciplining their children so that we may learn how to better intervene with parents to reduce stress and prevent harsh discipline and physical abuse of children.